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- Question
The book Historia plantrum is written by
Options- A. Aristotle
- B. Theophrastus
- C. Hipporates
- D. Darwin
- Correct Answer
- Theophrastus
- 1. Genes are made of
Options- A. Carbohydrates
- B. Proteins
- C. Fats
- D. Nucleotides Discuss
- 2. Organisms that live in the deep sea are mainly
Options- A. Herbivores
- B. Carnivores
- C. Detritivores
- D. None of the above Discuss
- 3. The grouping of blood is based on substances called
Options- A. antibodies
- B. antigens
- C. antitoxin
- D. enzymes Discuss
- 4. Organisms which synthesise their own food are called
Options- A. autotrophs
- B. heterotrophs
- C. auxotrophs
- D. saprotrophs Discuss
- 5. Organisms that feed on the excreta of other organisms are called
Options- A. autotrophs
- B. heterotrophs
- C. coprophagous
- D. saprotrophs Discuss
- 6. The insects do not have blood pigments because
Options- A. there is no blood
- B. blood does not have a respirratory function
- C. tissues have pigments
- D. pigments are elsewhere Discuss
- 7. In photosynthesis________
Options- A. Light energy is converted into chemical energy
- B. Chemical energy is converted into Light energy
- C. Chemical energy is converted into electrical energy
- D. Light energy is converted into Mechanical energy Discuss
- 8. Smallest bone of human body is _________
Options- A. Nails
- B. Fibula
- C. Bone of nose
- D. Stapes Discuss
- 9. A true species in mauritius failed to reproduce because of the extinction of a fruit eating bird. Which one of the following was that bird?
Options- A. Dove
- B. Dodo
- C. Condor
- D. Skua Discuss
- 10. Pollination is best defined as
Options- A. growth of pollen tube in ovule
- B. visiting flowers by insects
- C. germination of pollen grains
- D. transfer of pollen from anther to stigma Discuss
Biology problems
Search Results
Correct Answer: Nucleotides
Explanation:
Genes : The DNA is the genetic material. The DNA is made of several nucleotides. A nucleotide means, one nitrogenous base one sugar molecule and a phosphate molecule. These nucleotides occur in sequences and several nucleotides form one Gene ( a functional mgene is called a cistron)
Correct Answer: Detritivores
Explanation:
Deep sea animals cannot produce food as there is no light. They have to depend upon the fall out of organic debirs raining down on them from surface layers. Hence they are detritivores.
Correct Answer: antigens
Explanation:
The red blood corpuscles or erythrocytes usually carry antigens and there are two types of antigens. The A group persons have antigen A in their red corpuscles and the B group have antigen B in their red corpuscles. The AB group person have both antigen A and antigen B in their erythrocytes. The 'O' group persons have no antigens in their red corpuscles.
Correct Answer: autotrophs
Explanation:
Autotroph: This term means organisms that synthesise their own food. Troph means feeding. Auto means self. The green plants which synthesise their own food are called autotrophs. All others which depend upon the plants directly or indirectly are called heterotrophs.
Correct Answer: coprophagous
Explanation:
The word coprodaeum refers to the last part of the elimentary canal.The excreta (undigested, matter) comes out of that part. So, the organisms that take in such materials are called coprophagous.
Correct Answer: blood does not have a respirratory function
Explanation:
The blood of some invertebrate animals like the earthworm is red due to haemoglobin pigment, but the pigment is dissolved in the plasma. In vertebrates the same pigment is found in the red corpuscles and not in the plasma.
Correct Answer: Light energy is converted into chemical energy
Correct Answer: Stapes
Correct Answer: Dodo
Correct Answer: transfer of pollen from anther to stigma
Explanation:
Pollination is when pollen grains from an anther, the male portion of a flower, are transferred to a female part of the flower, known as the stigma. In order for pollination to be successful, the pollen grains transferred must be from a flower of the same species.
After the pollen grains land on the stigma, they create a pollen tube through the length of the style or stalk connecting the stigma and ovary. Once the pollen tube is complete, the pollen grain will send sperm cells from the grain down to the ovary. When the sperm cells reach the ovary and the egg cells, fertilization will occur, which will result in the formation of the seed. The seed will then be released from the parent plant and will be able to grow into a plant and continue the reproductive cycle using the method of pollination.
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